DE102022210894A1 - LENSES FOR MYOPIA MANAGEMENT USING PERIPHERAL EFFECTIVENESS INCREASE - Google Patents

Abstract

The present invention relates to a spectacle lens (10) with a specially shaped peripheral region with different optical properties to improve long-term wearing comfort while simultaneously improving perception. In particular, the spectacle lens (10) comprises: - a continuous channel region (12) which extends continuously from an upper edge (14) to a lower edge (16) of the spectacle lens; and - an effective region (18n, 18t) which borders horizontally on both sides of the continuous channel region (12) and extends continuously from the upper (14) to the lower edge (16) of the spectacle lens (10), the refractive power of the spectacle lens (10) increasing from the channel region (12) to the effective region (18n, 18t) on both sides of the channel region (12).

Description

The invention relates to a spectacle lens with at least one specially shaped peripheral region with different optical properties to improve long-term wearing comfort with simultaneous improved perception.

Especially in the case of lenses for correcting myopia, the often noticeable tendency for myopia to progress means that the comfort of the lenses once fitted and thus the wearer's satisfaction and the tolerability of the glasses decrease again after a short time.

In general, myopia is increasing dramatically worldwide, especially in Asia. The WHO estimates that by 2050, over 50% of all people will be myopic. As the myopia of an individual increases, the risk of associated eye diseases such as retinal detachment, glaucoma, cataracts and macular degeneration also increases significantly. There is therefore great interest in slowing the increase in myopia. There are several approaches to slowing the progression of myopia using optical aids (vision aids). What all of these approaches have in common, however, is that they are very complex and expensive and also quite inflexible when it comes to adapting them to rapidly changing circumstances (e.g. changes to the prescription for glasses, requirements of the visual system).

To date, various optical effects have been investigated in terms of the tolerability and comfort of ophthalmic lenses, particularly spectacle lenses, with regard to their influence on myopia and/or hyperopia and their progression or development depending on the optical and physiological mechanisms that are intended to explain or slow down progression or advancement, particularly deterioration. The existing approaches are essentially based on projecting the image in front of the retina, as this is intended to slow down the longitudinal growth of the eye. It has been shown that it is sufficient if this only takes place in the periphery of the retina.

One possible approach is the use of bifocal lenses and/or progressive lenses (PAL). On the one hand, the addition means that an area in the peripheral area is projected in front of the retina when looking into the distance, and on the other hand, when looking up close, the image is not projected behind the retina, at least if accommodation is too low. This works better for children with accommodative insufficiency and/or convergence excess. However, such approaches only achieve acceptable results in a smaller group with convergence excess. However, bifocal lenses are not desirable, especially for children, at least for cosmetic reasons.

Another approach is based on special PAL (or radially symmetric PAL) with a central sharp imaging effect and a peripheral addition (e.g. EN 10 2009 053 467 A1 ).

PAL, as in these two approaches, has areas with large aberrations. Furthermore, the quality of peripheral vision and also foveal vision when looking through the periphery of the lenses is greatly reduced by the aberrations. If high demands are placed on the visual system (e.g. in road traffic), this can only be solved with a second pair of single vision glasses. This increases the effort and costs of changing the prescription. The acceptance of such solutions is therefore often low.

Other approaches are based on special contact lenses. For example, progressive contact lenses with a higher plus effect in the periphery than in the central area have been investigated. In practice, however, this also impairs foveal vision. In addition, a new lens has to be made here too, which is a laborious process. Furthermore, handling and reliability in handling in children is limited. This is particularly true for small children, and what makes things even more difficult is that the greatest effect is actually achieved when measures to slow down myopia are started in early childhood.

Another approach with contact lenses uses so-called Ortho-K contact lenses, which are worn overnight and deform the cornea. This is intended to correct myopia centrally and also create a positive effect in the periphery (compared to centrally). However, here too, each contact lens is custom-made and a new lens must be manufactured at great expense, e.g. in the case of a new prescription. Furthermore, the effects of the deformation of the cornea on the metabolism and structure of the cornea are unclear, especially in small children.

The problem for glasses wearers resulting from the progression of myopia is the steadily decreasing comfort of glasses once they have been adjusted. Special lenses for myopia control attempt to move the focal plane of the visual field in the periphery in front of the retina and thus slow down the length growth of the eye.

Different lenses have already been proposed, for example, which are similar Like a progressive lens in the periphery, by adding the effect, the focal plane in the lateral field of vision can be brought in front of the retina (e.g. US7025460 ). In particular, there is the approach of having a central zone of good visibility, which is surrounded by an addition in front of the peripheral zone (eg WO2007041706A1 ) and the possibility of introducing the additional effect only in parts of the periphery (e.g. DE102009053467B4 The challenge with these lenses is to find the balance between the effectiveness of the lenses (e.g. with the largest possible areas of peripheral effect in front of the retina) and their tolerability (the optical comfort defined in particular by the zone with good or acceptable vision as well as by the distortions and rocking effects).

The object of the present invention is therefore to improve the long-term compatibility of glasses and thus to achieve long-term and high wearing comfort with simultaneously improved perception. This object is achieved according to the invention by a spectacle lens with the features specified in the independent claims. Preferred embodiments are the subject of the dependent claims.

The invention thus relates to a spectacle lens which comprises a continuous channel region and an effective region such that the (continuous) channel region extends continuously from an upper edge of the spectacle lens to a lower edge of the spectacle lens, and that the effective region borders the channel region horizontally on both sides and extends continuously on both sides from the upper to the lower edge of the spectacle lens. The refractive power of the spectacle lens increases from the channel region to the effective region on both sides of the channel region.

The canal area serves in particular as a prescription area, i.e. as an area of clear vision, since this is where the individual prescription data for correcting a visual impairment (in particular at least refractive power and astigmatism) are implemented in a prescription-like manner.

Compared to spectacle lenses whose central zone is completely surrounded by a plus effect, spectacle lenses according to the invention have the advantage of an enlarged field of vision with sharp perception, while tolerability is also improved to a surprising extent due to the significant reduction in distortions in all directions achieved. Compared to conventional spectacle lenses with only a partial plus area, the effect of suppressing myopia progression is significantly higher in spectacle lenses according to the invention.

In other words, these advantages of the spectacle lenses according to the invention are achieved in that the additional effect in particular fills most of the periphery of the spectacle lens, but leaves two special peripheral areas free, which are in particular approximately diametrically opposite: an area that extends downwards from the center, in particular slightly offset to the nose, in order to support close vision with the spectacle lens, in which the eyes assume a convergent position, and an area that extends upwards from the center in order to achieve stabilization of the image field and thus ensure tolerability and effectiveness at the same time. The optimal distribution of the areas with and without additional effect (in comparison to the prescription effect) in the periphery of the spectacle lens achieves maximum tolerability with a good preventive effect.

The directions “bottom” and “top” (and terms derived from them such as “below” and “above”) as well as terms for the directions “nasal”, “temporal”, “horizontal” and “vertical” are always seen in this description in relation to the position of use of the spectacle lens, which is determined in particular by the centering data for the spectacle lens. In this case, the “lower” and “upper” edges of the spectacle lens are preferably understood to mean an edge section of a lower or upper half, more preferably a lower or upper third, even more preferably a lower or upper quarter, of a spectacle lens surface (front surface and/or rear surface) of the spectacle lens. An upper or lower edge particularly preferably refers to: in particular a section of the edge of the entire spectacle lens which delimits the uppermost or lowermost 20%, preferably 15%, even more preferably 10%, most preferably 5%, of the vertical height of the spectacle lens. The spectacle lens referred to in this description can in particular be an already edged or ground (finished) spectacle lens or a raw round spectacle lens.

Preferably, a horizontal width of the channel region at the upper edge and at the lower edge of the lens (or in particular the respective distance of the points at which lateral boundary lines between the channel region and the effective area meet the edge of the lens) is smaller than a maximum horizontal width of the channel region. At least, however, it is preferred if the channel region in a vertically middle region (e.g. a middle third in terms of height) of the lens has a maximum horizontal width that is greater than a minimum horizontal width of the channel region above, in particular in a height-upper third of the lens and/or a minimum horizontal width of the Channel area below, in particular in a lower third of the lens in terms of height. This leads to a particularly high effectiveness of the area of effect, which is divided into a nasal area of effect and a temporal area of effect by the continuous channel, which is particularly narrow at the top and bottom. In particular, both the nasal and the temporal areas of effect extend contiguously from the upper to the lower edge of the lens, with both the nasal and the temporal areas of effect directly bordering the channel area, in particular along the entire length between the upper and lower edges of the lens. The refractive power increasing from the channel area to the area of effect preferably also runs steadily at the transition from the channel area to the area of effect, particularly on both sides. This achieves a calm visual impression even when the head moves.

Particularly preferably, the maximum refractive power in the nasal and temporal effective sections differ from one another by no more than about 3 dpt, preferably no more than about 2 dpt, even more preferably no more than about 1 dpt, most preferably no more than about 0.5 dpt. Alternatively or simultaneously, depending on the embodiment and area of application, the maximum refractive power in both the nasal and temporal effective sections is at least about 1 dpt, preferably at least about 1.5 dpt, more preferably at least about 2 dpt, even more preferably at least about 2.5 dpt, most preferably at least about 3 dpt, greater than the minimum refractive power in the canal area. The total range of variation in refractive power between a minimum refractive power in the canal area and a maximum refractive power in the effective area preferably also depends on a possible range of variation in refractive power within the canal area. For example, with a nominal "single vision lens" in which the refractive power varies only slightly across the entire canal area and a refractive power value compensates for the refraction deficit of the corresponding eye described in the prescription, a sufficient effect in the area of effect can possibly be achieved with a total range of refractive power variation between the canal area and the area of effect of up to 2 dpt. However, if the canal area already provides for a progressive increase in effect downwards in the form of a nominal "progressive lens", the total range of refractive power variation between the minimum refractive power in the canal area and the maximum refractive power in the area of effect could preferably also be larger. In particular, it is preferred if the horizontal increase in refractive power towards the area of effect or within the area of effect is large enough over the entire length of the canal area between the upper and lower edges of the lens to stimulate sufficient suppression of myopia progression. Therefore, in particular, the entire range of a refractive power variation between the minimum refractive power in the canal area and the maximum refractive power in the effective area is at least larger than the addition within the canal area.

In particular, the channel area within the spectacle lens is delimited on both sides by a channel boundary line towards the area of effect, which can be determined for each horizontal section through the spectacle lens in that the refractive power of the spectacle lens, starting from a position of a minimum refractive power within the channel area along the respective section towards the lateral sides, is there for the first time by a channel tolerance value (characteristic in particular for the channel area) higher than the respective minimum refractive power (within the channel area along the respective section). Preferably, the (channel-specific) channel tolerance value is in the range from approximately 0.25 dpt to approximately 0.5 dpt, in particular at 0.25 dpt, or at approximately 0.3 dpt or at approximately 0.35 dpt, or at approximately 0.4 dpt or at approximately 0.45 dpt or at approximately 0.5 dpt.

This type of definition of channel boundaries via the course of the channel boundary lines based on horizontal sections through the spectacle lens is particularly advantageous for many preferred embodiments of the invention because it allows the course and extension of the channel region to be essentially independent of the course of the absolute values of the refractive power along the channel region (e.g. in the presence of an addition in the case of a progressive lens, as will be described further below).

In a preferred embodiment, for at least 50%, preferably at least 60%, even more preferably at least 70%, most preferably at least 80%, of the height of the spectacle lens, in each horizontal section, a maximum refractive power in the nasal and/or temporal power section is at least one minimum power value greater than the minimum refractive power within the channel region along the respective section, wherein the minimum power value is about 0.25 dpt, preferably about 0.5 dpt, even more preferably about 1 dpt, most preferably about 1.5 dpt greater than the minimum refractive power within the channel region or about 0.25 dpt, preferably about 0.5 dpt, even more preferably about 1 dpt, most preferably about 1.5 dpt, greater than the channel tolerance value.

In a preferred embodiment, for at least 50%, preferably at least 60%, even more preferably at least 70%, most preferably at least 80% or even at least 90% of the height of the spectacle lens, in each horizontal section, the nasal and/or temporal power section has a power increase region immediately adjacent to the canal region with a horizontal width of at least 5 mm, preferably at least 10 mm, even more preferably at least 20 mm, within which the refractive power increases (preferably strictly) monotonically starting from the canal region towards the respective periphery.

In other words, in a preferred embodiment, for each horizontal cutting plane through the lens that intersects both the channel region and (in particular on both sides) the effective region, a corresponding boundary line can be defined between the channel region and the adjacent effective region where the refractive power of the lens, starting from the minimum refractive power within the channel region in the respective cutting plane (nasal and/or temporal) towards the effective region, is for the first time higher by a predetermined value (channel tolerance value) of in particular 0.25 dpt or 0.5 dpt (i.e. higher than said minimum refractive power within the channel region in the respective cutting plane). In other words, the channel region is defined in particular in such a way that its refractive power variation within each horizontal section is not greater than the channel tolerance value of in particular approximately 0.25 dpt or approximately 0.5 dpt.

The channel area is thus in particular completely delimited on the one hand by the channel boundary lines on both sides and on the other hand by the edge of the spectacle lens (in particular the upper and lower edges). Particularly preferably, for at least 50%, preferably at least 60%, even more preferably at least 70%, most preferably at least 80% of the height of the spectacle lens, for each horizontal section through the spectacle lens, the refractive power in the effective area increases from the respective channel boundary line up to a respective maximum refractive power by at least about 0.25 dpt, preferably by at least about 0.5 dpt, even more preferably by at least about 1 dpt, most preferably by at least about 1.5 dpt.

• - einen zentralen Hauptdurchblicksbereich;
• - eine unterhalb des zentralen Hauptdurchblicksbereichs angeordnete und sich vom zentralen Hauptdurchblicksbereich zum unteren Rand des Brillenglases erstreckende Nahsichtzone; und
• - einen oberhalb des zentralen Hauptdurchblicksbereichs angeordneten und sich vom zentralen Hauptdurchblicksbereich zum oberen Rand des Brillenglases erstreckenden oberen Kanalabschnitt.

In a preferred embodiment, the channel region comprises:

• - a central main viewing area;
• - a near vision zone located below the central main visual area and extending from the central main visual area to the lower edge of the lens; and
• - an upper channel section arranged above the central main viewing area and extending from the central main viewing area to the upper edge of the lens.

In a preferred embodiment, the spectacle lens has a substantially constant refractive power in the entire channel region, with a continuous line within the channel region from the upper to the lower edge of the spectacle lens, along which the refractive power of the spectacle lens varies in particular by no more than about 0.5 dpt, preferably no more than 0.25 dpt. Such a spectacle lens therefore acts as a nominal "single vision lens".

Particularly preferably, the spectacle lens has a (correspondingly) essentially constant refractive power at least in the central main viewing area and in the upper channel section. In the case of a nominal multifocal or "progressive lens", it is preferred if the spectacle lens has a higher average refractive power in the near vision zone than in the central main viewing area.

In order to particularly accommodate the convergence of the viewing directions in close vision, it is preferred if the close vision zone extends from the central main viewing area to the lower edge of the lens along a line, in particular a straight line, which extends from a center (in particular a centroid) of the central main viewing area nasally downwards at an angle in the range of about 0° to about 30°, preferably in a range of about 5° to about 20°, even more preferably in a range of about 8° to about 15° relative to the vertical. In particular, a center point (e.g. geometric center point or center point of an inscribed circle) of the central main viewing area can serve as the center.

Preferably, a horizontal width of the upper channel section (between the central main viewing area and the upper edge of the spectacle lens) is in a range of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 10 mm, and/or a horizontal width of the upper channel section (between the central main viewing area and the upper edge of the spectacle lens), or at least a minimum horizontal width of the upper channel section (i.e. at its narrowest point) is preferably in a range of not more than about 30 mm, more preferably not more than about 20 mm, even more preferably not more than about 10 mm.

Preferably, a horizontal width of the near vision zone (between the central main viewing area and the lower edge of the spectacle lens) is in a range of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 10 mm, and/or a horizontal width of the near vision zone (between the central main viewing area and the lower edge of the spectacle lens), or at least a minimum horizontal width of the near vision zone (i.e. at its narrowest point) is preferably in a range of not more than about 30 mm, preferably not more than about 20 mm, even more preferably not more than about 10 mm.

In a preferred embodiment, a (maximum) horizontal width of the central main viewing area is in a range of at least about 5 mm, preferably at least about 10 mm, even more preferably at least about 15 mm, most preferably at least about 20 mm, and/or a (maximum) horizontal width of the central main viewing area is in a range of not more than about 35 mm, preferably not more than about 30 mm, more preferably not more than about 25 mm, most preferably not more than about 20 mm. Another preferred spectacle lens can be characterized in that the central main viewing area comprises a circular area with a radius of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 8 mm; and/or wherein the central main viewing area lies within a circular area with a radius of at most about 25 mm, preferably at most about 20 mm, even more preferably at most about 15 mm, most preferably at most about 10 mm. In a further characterization of a preferred embodiment, the effective area lies outside a (central) circular area with a radius of at least about 10 mm, preferably at least about 15 mm, particularly preferably at least about 20 mm, even more preferably at least about 25 mm, most preferably at least about 30 mm, wherein in particular in a spectacle lens according to a preferred embodiment, this circular area lies within the central main viewing area.

• 1 schematische Darstellung einzelner Bereiche auf einem Brillenglas gemäß einer bevorzugten Ausführungsform;
• 2 schematische Darstellung einer beispielhaften Brechkraftverteilung in einem Brillenglas gemäß einer bevorzugten Ausführungsform;
• 3 zeigt eine konkrete Brechkraftverteilung in einem Brillenglas.

The invention is further described below using preferred embodiments with reference to the accompanying drawings, in which:

• 1 schematic representation of individual areas on a spectacle lens according to a preferred embodiment;
• 2 schematic representation of an exemplary refractive power distribution in a spectacle lens according to a preferred embodiment;
• 3 shows a concrete refractive power distribution in a spectacle lens.

1 shows a schematic distribution of individual areas on a spectacle lens 10 according to a preferred embodiment. A channel area 12 extends from an upper edge 14 of the spectacle lens 10 continuously to a lower edge 16 of the spectacle lens 10. When the correct prescription is applied for the corresponding eye, this channel area 12 serves as a clear vision area or prescription area of the spectacle lens 10 such that the user can see clearly through this area, since this area largely compensates for any visual impairment of the eye.

• - einen zentralen Hauptdurchblicksbereich 20, welcher insbesondere für einen Geradeausblick des Benutzers (bzw. einen Blick in die Ferne zum Horizont) dienen kann,
• - eine Nahsichtzone 22, welche sich ausgehend vom zentralen Hauptdurchblicksbereich 20 leicht nasal nach unten zum unteren Rand 16 des Brillenglases 10 erstreckt, und
• - einen oberen Kanalabschnitt 24, welcher sich ausgehend vom zentralen Hauptdurchblicksbereich 20 zum oberen Rand 14 des Brillenglases 10 erstreckt.

In the embodiment shown, the channel region 12 is schematically divided into three sections, namely:

• - a central main viewing area 20, which can be used in particular for the user to look straight ahead (or to look into the distance to the horizon),
• - a near vision zone 22, which extends from the central main viewing area 20 slightly nasally downwards to the lower edge 16 of the spectacle lens 10, and
• - an upper channel section 24 which extends from the central main viewing area 20 to the upper edge 14 of the spectacle lens 10.

In general (i.e. not only in this embodiment shown here), it is preferred if the upper channel section extends substantially along a vertical line, i.e. (in particular unlike the near vision zone) runs substantially vertically.

This channel region 12 is surrounded nasally and temporally by a respective nasal effective section 18n and temporal effective section 18t, which directly border the channel region 12, in particular along a respective nasal channel boundary line 26n and temporal channel boundary line 26t. The two effective sections 18n, 18t together form an effective area in which the spectacle lens 10 essentially has a higher refractive power compared to the prescription data implemented in the channel region. In other words, the refractive power of the spectacle lens 10 increases, in particular over the entire length of the channel region 12, from the channel region 12 on both sides to the effective area (or the respective effective sections), in particular in the area of the channel boundary lines 26n, 26t.

Within the channel area, however, the refractive power of the spectacle lens is at least partially essentially constant. Particularly preferably, the refractive power of the spectacle lens 10 is essentially constant at least in the main viewing area 20 and in the upper channel section 24. To achieve a nominal "single vision lens", the refractive power of the spectacle lens 10 is preferably essentially constant in the entire channel area 12. If, however, the invention is to be used in connection with a progressive lens effect, for example, the refractive power of the spectacle lens 10 can be higher at least in the near vision zone 22 than in the central main viewing area 20 in accordance with an addition specified in a (particularly individual) prescription.

As can be seen from the schematic representation of the preferred embodiment of 1 As can be seen, the central main viewing area 20 has a maximum horizontal width (between the channel boundary lines 26n, 26t) which is in particular greater than a minimum horizontal width of the near vision zone 22 and a minimum horizontal width of the upper channel section 24. It is precisely the combination of an essentially constant refractive power in the central main viewing area 20 and the upper channel section 24 with the (at least partially or partially) small channel width in the upper channel section 24 that achieves a high level of effectiveness of the entire range of effects in terms of suppressing myopia progression combined with a surprisingly good tolerability of the glasses. Unlike in concepts with continuous ranges of effects at the top, the concept described here primarily keeps distortions and rocking effects to a minimum. This improvement is basically achieved both for single vision lenses (i.e. when the entire channel area 12 has an essentially constant refractive power) and for progressive lenses (i.e. when the near vision zone 22 in particular has an addition).

2 shows a schematic representation of an exemplary refractive power distribution in a spectacle lens according to a preferred embodiment. This schematic representation could in principle be applied in particular to a spectacle lens 10 made of 1 correspond, whereby in 2 The specific distribution of the refractive power makes it clear that an embodiment is shown here as a single vision lens. Here, the channel area 12, which includes the upper channel section 24, the central main viewing area 20 and the near vision zone 22, extends in this order from the upper edge 14 of the lens 10 to the lower edge 16 of the lens. The nasal effective section 18n and the temporal effective section 18t border on the sides of this channel area 12.

In addition to the entire edge contour of the lens in 2 The lines shown represent lines (isolines) of the same refractive power of the lens 10. For example, the refractive power distances of neighboring lines in 2 each represent a difference of 0.5 dpt. As can be seen from this, the entire canal area lies in an area with essentially constant refractive power, which corresponds precisely to a single vision lens. The refractive power of the spectacle lens 10 in the canal area does not have to be 0. It can be both positive and negative. In practice, the invention will be particularly relevant in connection with a negative refractive power of the spectacle lens 10 in the canal area, since further myopia progression is more common, particularly in the case of existing myopia, and the spectacle lenses according to the invention are particularly suitable here.

Irrespective of the absolute value of the refractive power, the spectacle lens 10 has the following representation: 2 in the channel area 12, in any case, the lowest refractive power. Towards the lateral effective sections 18n, 18t, the refractive power of the spectacle lens 10 then increases steadily and reaches its respective maximum in the schematic representation at approximately mid-height in the area of the lateral edges of the spectacle lens 10.

The course and extent of the channel region 12 can be defined for preferred embodiments via limit values of the refractive power of the spectacle lens 10. While in general, which is particularly advantageous when the present invention is used for progressive lenses, a comparison of the refractive power described above can be carried out along horizontal sections, it is also possible, particularly when the invention is used for single vision lenses, to use a global refractive power limit based on the channel tolerance value to define the course of the channel boundary lines for characterizing the channel region 12 of preferred embodiments. Thus, in a characterization of preferred embodiments of the invention, particularly for use in single vision lenses, the channel boundary lines could be defined by the refractive power of the spectacle lens, starting from a position within the channel region 12 towards the lateral effective sections, being higher there for the first time by the channel tolerance value (characteristic in particular for the channel region) than a minimum refractive power within the (entire) channel region 12. Otherwise, what has already been described at the beginning can apply to the channel tolerance value. Referring to the schematic representation in 2 For example, the two isolines for the smallest marked refractive power can be used as channel boundary lines 26n, 26t.

3 Finally, an example of a specific refractive power distribution in a spectacle lens according to a preferred embodiment is shown. An example dimension in mm is given on the horizontal and vertical axes, while the isolines connect positions of the same refractive power. The difference in the refractive power values of neighboring isolines is, as can be seen from the label, 0.25 dpt in this case. This is also a single vision lens.

List of reference symbols

10

Lens

12

Channel area

14

upper edge

16

lower edge

18n

nasal effect section

18t

temporal period of effect

20

central main viewing area

22

Near vision zone

24

upper channel section

26n

nasal canal borderline

26t

temporal canal boundary line

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 102009053467 A1 [0006]
• US7025460 [0011]
• WO 2007041706 A1 [0011]
• DE 102009053467 B4 [0011]

Claims (16)

Spectacle lens (10) comprising: - a continuous channel region (12) which extends continuously from an upper edge (14) to a lower edge (16) of the spectacle lens; and - an effective region (18n, 18t) which is horizontally adjacent to the continuous channel region (12) on both sides and extends continuously from the upper (14) to the lower edge (16) of the spectacle lens (10), the refractive power of the spectacle lens (10) increasing from the channel region (12) to the effective region (18n, 18t) on both sides of the channel region (12). Lens (10) by Claim 1 , wherein a horizontal width of the channel area at the upper edge and at the lower edge of the lens is smaller than a maximum horizontal width of the channel area. Lens (10) by Claim 1 or 2 , wherein the action region comprises a nasal action section (18n) and a temporal action section (18t), each of which is formed contiguously and which are separated from one another by the channel region (12). Lens (10) by Claim 3 , wherein the maximum refractive power in the nasal (18n) and in the temporal effective section (18t) differs from one another by no more than about 3 dpt, preferably no more than about 2 dpt, even more preferably no more than about 1 dpt, most preferably no more than about 0.5 dpt, and/or wherein the maximum refractive power in both the nasal (18n) and in the temporal effective section (18t) is at least about 1 dpt, preferably at least about 1.5 dpt, more preferably at least about 2 dpt, even more preferably at least about 2.5 dpt, most preferably at least about 3 dpt greater than the minimum refractive power in the canal region (12). Lens (10) by Claim 3 or 4 , wherein for at least 50%, preferably at least 60%, even more preferably at least 70%, most preferably at least 80% of the height of the spectacle lens (10), in each horizontal section, a maximum refractive power in the nasal and/or temporal power section is at least a minimum power value greater than the minimum refractive power within the channel region along the respective section, wherein preferably the minimum power value is approximately 0.25 dpt, preferably approximately 0.5 dpt, even more preferably approximately 1 dpt, most preferably approximately 1.5 dpt greater than the minimum refractive power within the channel region. Spectacle lens (10) according to one of the preceding claims, wherein the channel region (12) within the spectacle lens (10) is delimited on both sides by a channel boundary line which is defined for each horizontal section through the spectacle lens in that the refractive power of the spectacle lens, starting from a position of a minimum refractive power within the channel region along the respective section, is there for the first time higher by a channel tolerance value than the respective minimum refractive power. Lens according to Claim 6 , wherein the channel tolerance value is in the range of about 0.25 dpt to about 0.5 dpt, in particular at 0.25 dpt, or at about 0.3 dpt or at about 0.35 dpt, or at about 0.4 dpt or at about 0.45 dpt or at about 0.5 dpt Lens according to Claim 6 or 7 , wherein the minimum power value is about 0.25 dpt, preferably about 0.5 dpt, even more preferably about 1 dpt, most preferably about 1.5 dpt greater than the channel tolerance value. Spectacle lens (10) according to one of the preceding claims, wherein the channel region (12) comprises: - a central main viewing region (20); - a near vision zone (22) arranged below the central main viewing region (20) and extending from the central main viewing region (20) to the lower edge (16) of the spectacle lens (10); and - an upper channel section (24) arranged above the central main viewing region (20) and extending from the central main viewing region (20) to the upper edge (14) of the spectacle lens (10). Lens (10) by Claim 9 which has a substantially constant refractive power in the central main viewing area (20) and in the upper channel section (24). Lens (10) by Claim 9 or 10 which has a substantially constant refractive power in the central main viewing area (20) and in the near vision zone (22). Lens (10) by Claim 9 or 10 which has a higher average refractive power in the near vision zone (22) than in the central main viewing area (20). Spectacle lens (10) according to one of the Claims 9 until 12 , with the near vision zone extending from the central main viewing area to the lower edge of the Spectacle lens extends along a line, in particular a straight line, which extends from a center (in particular a centroid) of the central main viewing area nasally downwards at an angle in the range of about 0° to about 30°, preferably in a range of about 5° to about 20°, even more preferably in a range of about 8° to about 15° relative to the vertical. Lens according to one of the Claims 9 until 13 , wherein a horizontal width of the upper channel portion is in a range of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 10 mm, and/or wherein a horizontal width of the upper channel portion, or at least a minimum horizontal width of the upper channel portion is in a range of not more than about 30 mm, preferably not more than about 20 mm, even more preferably not more than about 10 mm. Lens according to one of the Claims 9 until 14 , wherein a horizontal width of the near vision zone is in a range of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 10 mm, and/or wherein a horizontal width of the near vision zone, or at least a minimum horizontal width of the near vision zone is in a range of not more than about 30 mm, preferably not more than about 20 mm, even more preferably not more than about 10 mm. Lens according to one of the Claims 9 until 15 , wherein a horizontal width of the central main viewing area is in a range of at least about 5 mm, preferably at least about 10 mm, even more preferably at least about 15 mm, most preferably at least about 20 mm, and/or wherein a horizontal width of the central main viewing area is in a range of not more than about 35 mm, preferably not more than about 30 mm, more preferably not more than about 25 mm, most preferably not more than about 20 mm.

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